/* 基础样式 */
body {
    padding-top: 56px;
    background-color: #f8f9fa;
}

.sidebar {
    position: fixed;
    top: 56px;
    bottom: 0;
    left: 0;
    z-index: 100;
    padding: 20px 0;
    box-shadow: inset -1px 0 0 rgba(0, 0, 0, .1);
    background-color: #f8f9fa;
}

.content {
    padding: 20px;
    margin-left: 200px;
}

.navbar-brand {
    font-weight: 600;
}

.nav-link {
    font-weight: 500;
}

.card {
    margin-bottom: 20px;
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, .075);
}

.table-responsive {
    overflow-x: auto;
}

.alert {
    margin-bottom: 1rem;
}

.footer {
    background-color: #f8f9fa;
    padding: 1rem 0;
    margin-top: 2rem;
}